261RevD_DocSpec.pdf part of Keithley 261RevD DocSpec 261RevD_DocSpec.pdf, Keithley 261 261RevD

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Model 261
Picoampere Source Revised l/16/89

OUTPUT: lO-14A (10-t 1A full rdnge) to 1.1 x IO-4A, pwtlve or nci;dlive, in eight
Wl"&p.
ACCURACY: Exclu~ivc 01 input drop considcrdtiw
ACCURACY WITtI WORST-CASE
10.00 SE'ITINC WITH SETTING
HANCE f1OV SOURCE OTHER THAN
SEITINC SPAN, AMPERE VOLTAGE) 10.00*
lo-7 to l&5 10-7 to 1.1 x If+ iO.25% iO.?!iY"
Id IO-8 to IO-7 +0.5 % io.5 %
lo-9 lo-9 to lti +0.6 % kO.8 %
lo-10 l&l0 to lo-9 +0.6 % fl.1 %
10-11 lo-11 to lo-10 al.6 % ztl.3 %
l&l2 W-12 to lo-" +0.7 % il.6 %
IO-12 1wl4 to 10-12 f2.0 %
`All axx~rac~cs ~CC the pcrccntage given, iU.01 x range switch xttmg.
+
LONG-TERM STABILITY: Will aperatc within stated spccilicntions for thrw months after
calibration. After three months add 0.15% per month tu 10-8 through 1(kl2A ran&e setting
accuracy spwifications.
TEMPERATURE COEFFICIENT: +.O.l%/`C from 15